public TEntity EndExecute(IAsyncResult ar)
{
var rs = InternalEndExecute(ar);
Row row = rs.GetRows().FirstOrDefault();
if (row == null)
{
if (((MethodCallExpression)Expression).Method.Name == "First")
{
throw new InvalidOperationException("Sequence contains no elements.");
}
else if (((MethodCallExpression)Expression).Method.Name == "FirstOrDefault")
{
return(default(TEntity));
}
}
CqlColumn[] cols = rs.Columns;
var colToIdx = new Dictionary <string, int>();
for (int idx = 0; idx < cols.Length; idx++)
{
colToIdx.Add(cols[idx].Name, idx);
}
var tag = (CqlQueryTag)Session.GetTag(ar);
return(CqlQueryTools.GetRowFromCqlRow <TEntity>(row, colToIdx, tag.Mappings, tag.Alter));
}
protected override string GetCql(out object[] values)
{
bool withValues = GetTable().GetSession().BinaryProtocolVersion > 1;
return(CqlQueryTools.GetInsertCQLAndValues(_entity, (GetTable()).GetQuotedTableName(), out values, _ttl, _timestamp, _ifNotExists,
withValues));
}
internal IEnumerable <TEntity> AdaptRows(IEnumerable <Row> rows, Dictionary <string, int> colToIdx, CqlExpressionVisitor visitor)
{
foreach (Row row in rows)
{
yield return(CqlQueryTools.GetRowFromCqlRow <TEntity>(row, colToIdx, visitor.Mappings, visitor.Alter));
}
}
public void Create()
{
List <string> cqls = CqlQueryTools.GetCreateCQL(this, false);
foreach (string cql in cqls)
{
_session.WaitForSchemaAgreement(_session.Execute(cql));
}
}
public void Create()
{
var cqls = CqlQueryTools.GetCreateCQL(this);
foreach (var cql in cqls)
{
_session.WaitForSchemaAgreement(_session.Execute(cql));
}
}
public void Create(ConsistencyLevel consictencyLevel = ConsistencyLevel.Default)
{
var cqls = CqlQueryTools.GetCreateCQL(this);
foreach (var cql in cqls)
{
_session.Cluster.WaitForSchemaAgreement(_session.Execute(cql, consictencyLevel).QueriedHost);
}
}
public bool AppendChangesToBatch(StringBuilder batchScript, string tablename)
{
bool enableTracing = false;
foreach (var kv in _table)
{
if (!CqlEqualityComparer <TEntity> .Default.Equals(kv.Key, kv.Value.Entity))
{
throw new InvalidOperationException();
}
if (kv.Value.QueryTracingEnabled)
{
enableTracing = true;
}
var cql = "";
if (kv.Value.MutationType == MutationType.Add)
{
cql = CqlQueryTools.GetInsertCQL(kv.Value.Entity, tablename);
}
else if (kv.Value.MutationType == MutationType.Delete)
{
cql = CqlQueryTools.GetDeleteCQL(kv.Value.Entity, tablename);
}
else if (kv.Value.MutationType == MutationType.None)
{
if (kv.Value.CqlEntityUpdateMode == EntityUpdateMode.AllOrNone)
{
cql = CqlQueryTools.GetUpdateCQL(kv.Key, kv.Value.Entity, tablename, true);
}
else
{
cql = CqlQueryTools.GetUpdateCQL(kv.Key, kv.Value.Entity, tablename, false);
}
}
else
{
continue;
}
if (cql != null)
{
batchScript.AppendLine(cql + ";");
}
}
return(enableTracing);
}
protected override Expression VisitConstant(ConstantExpression node)
{
if (node.Value is ITable)
{
var table = (node.Value as ITable);
QuotedTableName = table.GetQuotedTableName();
AllowFiltering = table.GetEntityType().GetCustomAttributes(typeof(AllowFilteringAttribute), false).Any();
var props = table.GetEntityType().GetPropertiesOrFields();
foreach (var prop in props)
{
var memName = CqlQueryTools.CalculateMemberName(prop);
Alter[prop.Name] = memName;
}
return(node);
}
else if (phasePhase.get() == ParsePhase.Condition)
{
WhereClause.Append(node.Value.Encode());
return(node);
}
else if (phasePhase.get() == ParsePhase.SelectBinding)
{
if (Alter.ContainsKey(currentBindingName.get()))
{
Mappings[currentBindingName.get()] = Tuple.Create(currentBindingName.get(), node.Value, Mappings.Count);
SelectFields.Add(currentBindingName.get());
}
else
{
Mappings[currentBindingName.get()] = Tuple.Create <string, object, int>(null, node.Value, Mappings.Count);
}
return(node);
}
else if (phasePhase.get() == ParsePhase.Take)
{
Limit = (int)node.Value;
return(node);
}
else if (phasePhase.get() == ParsePhase.OrderBy || phasePhase.get() == ParsePhase.OrderByDescending)
{
OrderBy.Add(Alter[(string)node.Value].QuoteIdentifier() + (phasePhase.get() == ParsePhase.OrderBy ? " ASC" : " DESC"));
return(node);
}
throw new CqlLinqNotSupportedException(node, phasePhase.get());
}
public IEnumerable <TEntity> EndExecute(IAsyncResult ar)
{
using (var outp = InternalEndExecute(ar))
{
QueryTrace = outp.Info.QueryTrace;
var cols = outp.Columns;
var colToIdx = new Dictionary <string, int>();
for (int idx = 0; idx < cols.Length; idx++)
{
colToIdx.Add(cols[idx].Name, idx);
}
var rows = outp.GetRows();
var tag = (CqlQueryTag)Session.GetTag(ar);
foreach (var row in rows)
{
yield return(CqlQueryTools.GetRowFromCqlRow <TEntity>(row, colToIdx, tag.Mappings, tag.Alter));
}
}
}
public void CreateIfNotExists()
{
if (_session.BinaryProtocolVersion > 1)
{
List <string> cqls = CqlQueryTools.GetCreateCQL(this, true);
foreach (string cql in cqls)
{
_session.WaitForSchemaAgreement(_session.Execute(cql));
}
}
else
{
try
{
Create();
}
catch (AlreadyExistsException)
{
//do nothing
}
}
}
public override string ToString()
{
object[] _;
return(CqlQueryTools.GetInsertCQLAndValues(_entity, (GetTable()).GetQuotedTableName(), out _, _ttl, _timestamp, _ifNotExists, false));
}
protected override string GetCql()
{
return(CqlQueryTools.GetInsertCQL(_entity, (GetTable()).GetQuotedTableName(), _ttl, _timestamp));
}
public void SaveChangesOneByOne(Context context, string tablename, ConsistencyLevel consistencyLevel)
{
var commitActions = new List <Action>();
try
{
foreach (var kv in _table)
{
if (!CqlEqualityComparer <TEntity> .Default.Equals(kv.Key, kv.Value.Entity))
{
throw new InvalidOperationException();
}
var cql = "";
if (kv.Value.MutationType == MutationType.Add)
{
cql = CqlQueryTools.GetInsertCQL(kv.Value.Entity, tablename);
}
else if (kv.Value.MutationType == MutationType.Delete)
{
cql = CqlQueryTools.GetDeleteCQL(kv.Value.Entity, tablename);
}
else if (kv.Value.MutationType == MutationType.None)
{
cql = CqlQueryTools.GetUpdateCQL(kv.Key, kv.Value.Entity, tablename,
kv.Value.CqlEntityUpdateMode == EntityUpdateMode.AllOrNone);
}
else
{
continue;
}
QueryTrace trace = null;
if (cql != null) // null if nothing to update
{
var res = context.ExecuteWriteQuery(cql, consistencyLevel, kv.Value.QueryTracingEnabled);
if (kv.Value.QueryTracingEnabled)
{
trace = res.Info.QueryTrace;
}
}
var nkv = kv;
commitActions.Add(() =>
{
if (nkv.Value.QueryTracingEnabled)
{
if (trace != null)
{
lock (_traces)
_traces[nkv.Key] = trace;
}
}
_table.Remove(nkv.Key);
if (nkv.Value.MutationType != MutationType.Delete && nkv.Value.CqlEntityTrackingMode != EntityTrackingMode.DetachAfterSave)
{
_table.Add(Clone(nkv.Value.Entity), new TableEntry()
{
Entity = nkv.Value.Entity, MutationType = MutationType.None, CqlEntityUpdateMode = nkv.Value.CqlEntityUpdateMode
});
}
});
}
}
finally
{
foreach (var act in commitActions)
{
act();
}
}
}
protected override string GetCql()
{
return(CqlQueryTools.GetInsertCQL(_entity, (GetTable()).GetTableName()));
}
